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Gembook MCP server

Which MCP servers are Gembook's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

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Whose server it is
  • Registry namexyz.gembook/gembookverified in the MCP registry

The registry name sits under gembook.xyz. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools3
  • Server calls itselfgembook
  • Server version0.1.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 157 ms.

Tools it offers3 tools · read 2026-10-26
  • lookup_card_price

    Get Gembook's fair-value estimate (USD) for a PSA-graded vintage Pokémon card (WotC era, Base Set through Skyridge, 1999–2003). Returns fair value, range, confidence tier, comp count, and the card page URL. Call this when a user asks what…

  • lookup_pop_report

    Get the PSA population (number of slabs graded per grade) for a vintage Pokémon card across all grades. Call this when a user asks how rare a PSA grade is for a card. Scope: PSA-graded vintage Pokémon (Base Set through Skyridge).

  • get_methodology_summary

    Returns a short summary of Gembook's valuation + trust methodology (what counts as a verified sale, confidence tiers, published error rates). Call this when a user asks how the prices are computed or whether they can be trusted.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "gembook": {
      "type": "http",
      "url": "https://gembook.xyz/api/mcp/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http gembook https://gembook.xyz/api/mcp/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://gembook.xyz/api/mcp/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.